多线程继承Thread

匿名线程方式

class Demo11
{
    public static void main(String s[])
    {
        new Thread(){
            public void run()
            {
                while(true)
                {
                    System.out.println(1);
                }   
            }
        }.start();
    }
}

类继承方式

class A extends Thread
{
    public void run()
    {
        for(int i=0;i<100;i++)
        {
            try
            {
                Thread.sleep(1000);
            }
            catch(Exception e)
            {
                System.out.println(e.getMessage());
                e.printStackTrace();
            }
            System.out.print(i+"\t");
        }
    }
}


class Demo11
{
    public static void main(String s[])
    {
        A a1 = new A();
        A a2 = new A();
        A a3 = new A();
        A a4 = new A();
        
        
        a1.start();
        a2.start();
        a3.start();
        a4.start();
    }
}